this is actually very smart because the vast majority of helmet collisions occur at angle with the ground that brings the chin area of the helmet first in contact with the ground.
this is indeed why the old timey leather and skull helmets have been abandoned in favor of full head/chin-protecting helmets.
a helmet that opens at the back instead of the bottom can be designed to fit your chin and neck far better than one where you must slip slide your entire chin and neck through the opening.
however, to take advantage of the design properly, one must build and install custom chin/neck inserts to ensure the chin and neck area are protected with very snug and tight tolerances of material. otherwise, you can just as easily have a loose fitting helmet with a hindentry design as you could with a bottom entry design....

Price & DOT Certification?

I have a Spartacus type jaw and others have very little chin. I wonder how this helmet fits the variety of jaw sizes that humans have.

I doubt this will take off - this helmet combines all the cost, complexity, weight and wind noise of a flip face helmet with the biggest disadvantage of a standard helmet, which is not being able to open the front when riding in stifling heat. Most likely you will have to take your glasses off for putting it on, too, which is very inconvenient.

Hello, I want buy this helmet. Kindly tell me how can i buy it ?

Regards

Aqeel
Ph # 00923338178681
Pakistan

My ears at happy at the concept of not being ruffled up every time I put a helmet on and off. This is such a smart idea, it's hard to imagine it's not in full use today!

Price and style are the two main drivers in this market.

looks similar to a helmet NASA used for 19 of its space shuttle missions before the crews started to wear pressure suites again. I wish i could post a picture of it. I like that helmet looks like it would be easier to put on over glasses

Full face helmets 'steam up' in the rain, especially when the rider stops in traffic, and there is no airflow. How will this helmet overcome this problem?

This might be better in cold weather than traditional helmets because the opening under the chin doesn't have to be as large.